Grinding apparatus.



PATENTBD JUNE 7, 1904.

- n. 00X. GRINDING APPARATUS. APPLICATION FILED SEPT. 30, 1903.

2 SHEETS-SHEET 2.

H0 MODEL.

Patented June '7, 1904.

PATENT @FFICE.

DANDRIDGE COX, OF CAMDEN, NEW JERSEY.

GRINDING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 762,147, dated June '7, 1904.

Application filed September 30, 1903. Serial No. 175,184. (No model.)

To all whom it may concern:

Be it known that I, DANDRIDGE Cox,a citizen of the United States, residing at Camden, in the county of Camden and State of New Jersey, have invented new and useful Improvements in Grinding Apparatus, of which the following is a specification.

y invention relates to new and useful improvements in grinding apparatus; and its object is to provide a simple and inexpensive device of this character which is compact and durable and is especially adapted to be clamped upon a table or other convenient article of furniture and used for sharpening knives, &c. It is designed especially for use in kitchens.

The invention consists in providing a frame which is adapted to be clamped upon a table, and at the upper end of thisframe is journaled a shaft having a gear and. a grinding-disk at opposite ends. The gear meshes with teeth formed upon the inner surface of the rim of a power-wheel, which is mounted on the side of the frame and is adapted to be rotated by means of a handle provided therefor.

The invention also consists in the further novel construction, combination, and arrangement of parts hereinafter more fully described and claimed, and illustrated in the accompanying drawings, showing the preferred form of my invention, and in which- Figure l is a side elevation of my improved grinding apparatus. Fig. 2 is a vertical section therethrough. Fig. 3 is a front elevation. Fig. at is a detail view of the gear of the grinding-disk, and Fig. 5 is a perspective View of one end of the shaft of said disk.

Referring to the figures by numerals of reference, 1 is a casting forming the body of the apparatus and having a forwardly-extending arm2 at its lower end, in which is mounted a screw 3. A thumb-nut 4 is arranged at the lower end of this screw, while the other end thereof is swiveled within a clamping plate or block 5. ,A bracket 6 is formed integral with the front face of the body 1 and extends over the block 5. This bracket has strengthening webs or ribs 7. Arranged within the body 1' is the reduced portion 8 of a bolt. The shoulder 9 formed by this reduced portion bears upon the rear face of the body and, together with a nut 10 upon the front end of the,

bolt, serves to clamp upon the body 1. The outer portion of the bolt forms a bearing for a power-wheel 11, having a handle '12 extending from the outer face thereof. A flange 13 extends. inwardly from the periphery of this wheel and is provided on its inner face with teeth 14:. These teeth are adapted to mesh with a gear 15, having a tapered angular aperture 16 therein, adapted to receive the angular enlarged end 17 of a bolt 18. This bolt is revolubly mounted within the upper end of the body and has a screw-threaded portion 19 which extends through a disk 20, formed of emery or other suitable grinding material. Washers 21 are arranged at opposite sides .of the disk 20, and nuts 22 are provided for clamping these washers upon the grindingdisk.

It will be understood that in using this device the edge of a table is inserted between the bracket 6 and the block 5, and said block is adjusted upward, so as to clamp upon the table. The gear-wheel 11 is then rotated by means of the handle 12 and causes the gear 15 and grinding-disk 20 to rapidly rotate. By arranging the teeth 14 upon the inner surface of the flange 13 and by inclosing the gear 15 by means of this flange it is practically impossible for any article of clothing of theoperator to become entangled therein, and the teeth are protected from injury by articles which might accidentally hit and break them. If desired, a polishing-wheel formed of any suitable material may be substituted for the grinding-disk, or any other suitable implement may be used in lieu thereof. By providing the detachable clamping-nuts 22 the interchanging of the tools upon the shaft 18 may be easily accomplished.

From the foregoing description I have shown the preferred form of my invention; but I do not limit myself thereto, as I am aware that modifications may be madetherein Without departing from the spirit or sacrificing the advantagesthereof, and I therefore reserve'the right to make such changes and alterations as may fairly fall withinthe scope of my invention.

Having thus described the invention, what is claimed as new is I A device of the character described comprising a body having a laterally-extending arm integral with one end thereof, and a reinforced bracket integral with the body and overhanging the arm, an adjustable clamping-block supported by the arm, a power- Wheel, a bearing therefor detachably connected to and extending through the body, a flange extending inwardly from the periphery of the power-Wheel and having teeth upon its inner face, a shaft revolubly mounted in one end of the body and having an angular tapered head at one end, a gear mounted upon said head and having a recess of the same configuration as said head, said gear meshing With the teeth on the flange, means upon the shaft for holding it Within the body and for holding the head in engagement with the recess in the gear, a grinding-disk upon the shaft, and means for clamping and rigidly securing the disk upon the shaft-retaining means.

In testimony whereof I afiirg my signature in presence of two Witnesses.

DAN DRIDGE COX. 

